You said the spirit is the breath of life, the life force of the body. Is this a conscious existence?
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From the verses and the definitions which I have provided below, you can decide for yourself........Do you personally Have a conscious existence?
Gen. 2:7
And the LORD God formed man of the dust of the ground,
and breathed into his nostrils the breath of life; and man became a living soul.
Hebrew BREATH: Same as SPIRIT
H5397 Below
Gen. 6:17
And, behold, I, even I, do bring a flood of waters upon the earth,
to destroy all flesh, wherein is the breath of life, from under heaven; and every thing that is in the earth shall die.
Gen. 7:22
All in whose nostrils was the breath of life, of all that was in the dry land, died.
Hebrew BREATH: Same as SPIRIT
H7307 Below
1 Co. 2:11
For what man knoweth the things of a man,
save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.
SPIRIT: Greek
G4151
πνεῦμα
pneuma
pnyoo'-mah
a current of air, that is, breath (blast) or a breeze; by analogy or figuratively a spirit, that is, (human) the rational soul, (by implication) vital principle, mental disposition, etc., or (superhuman) an angel, daemon, or (divine) God, Christ’s spirit, the Holy spirit: - ghost, life, spirit (-ual, -ually), mind. Compare G5590.
G5590 Greek
ψυχή
psuchē
psoo-khay'
From G5594; breath, that is, (by implication) spirit, abstractly or concretely (the animal sentient principle only; thus distinguished on the one hand from G4151, which is the rational and immortal soul; and on the other from G2222, which is mere vitality, even of plants: these terms thus exactly correspond respectively to the Hebrew [H5315], [H7307] and [H2416]: - heart (+ -ily), life, mind, soul, + us, + you.
Zec. 12:1
The burden of the word of the LORD for Israel, saith the LORD, which stretcheth forth the heavens, and layeth the foundation of the earth, and formeth
the spirit of man within him.
Ecc. 3:21
Who knoweth the spirit of man that goeth upward, and the spirit of the beast that goeth downward to the earth?
SPIRIT: Hebrew
H7307
רוּחַ
rûach
roo'-akh
From H7306; wind; by resemblance breath, that is, a sensible (or even violent) exhalation; figuratively life, anger, unsubstantiality; by extension a region of the sky; by resemblance spirit, but only of a rational being (including its expression and functions): - air, anger, blast, breath, X cool, courage, mind, X quarter, X side, spirit ([-ual]), tempest, X vain, ([whirl-]) wind (-y).
Pro. 20:27
The spirit of man is the candle of the LORD, searching all the inward parts of the belly.
SPIRIT: Hebrew
H5397
נְשָׁמָה
neshâmâh
nesh-aw-maw'
A puff, that is, wind, angry or vital breath, divine inspiration, intellect or (concretely) an animal: - blast, (that) breath (-eth), inspiration, soul, spirit.